first, let's add x to both sides to get:
2x - 5 + x < -12
3x - 5 < -12
now let's add 5 to both sides.
3x < -12 + 5
3x < -7
lastly, let's divide 3 from both sides.
x < -7/3
so, in interval notation, the answer would be:
(-inf, -7/3)
hope this helped! please let me know if you are confused about anything i did :)